| 1970 | Graduated from the National Defense Academy of Japan |
| 1980 | Exchange Instructor at the U.S. Naval Academy |
| 1987 | Commanding Officer of JDS YUGUMO |
| 1992 | Visiting Fellow at Stanford University |
| 1994 | M.S., National Resource Strategy, U.S. National Defense University |
| 1995 | M.A., International Public Policy, SAIS, Johns Hopkins University |
| 1996 | Defense Attache at the Japanese Embassy in the U.S. |
| 2001 | Director of the Defense Intelligence Headquarters |
| 2003 | Ph.D., International Relations, SAIS, Johns Hopkins University |
| 2005 | Professor & Director of the Center for National Security and Crisis Management Education, National Defense Academy of Japan |
| 2005 | Retired as Vice Admiral |
| 2006 | Adjunct Professor, GRIPS |
| 2009 | Director of the International Exchange Program, NDA of Japan |